Often, Ash has to complete a quest. In a fanfic with Ho - Oh, Ash might have to find three special feathers scattered across the region. These feathers are said to be the key to summoning Ho - Oh. As he embarks on this journey, he faces many challenges and overcomes them with his existing Pokemon team. Once he collects all the feathers, Ho - Oh appears and, impressed by Ash's determination, decides to fight alongside him. Another way is through a prophetic vision. Ash might have a dream that tells him how to find and bond with a Legendary like Entei, and he follows this vision to make it happen.
There's also 'Legendary Pokemon: The Forbidden TF'. This fanfiction delves into a darker side of pokemon transformation. It involves an ancient spell that forces legendary pokemon to change forms, leading to a series of events that endanger the pokemon world. It's really exciting to read as it unfolds the mystery behind the transformation.
Articuno, Zapdos, and Moltres are quite common. Their elemental powers and the mystery surrounding them make for great fanfiction material. Ash might encounter them during his travels and have to either help them or face off against them in some way.
One of the Legendary Pokemon could be Giratina. Despite its somewhat dark and otherworldly nature, Giratina might be intrigued by Ash's light - heartedness and his ability to make friends with all kinds of Pokemon. Dialga and Palkia could also be part of the harem. Dialga, with its control over time, might see Ash as an important factor in the future of the Pokemon world. Palkia, in charge of space, could be interested in how Ash navigates different regions and spaces in his journey. And don't forget about Ho - Oh. Ho - Oh is a symbol of hope and might see Ash as a bringer of hope in the Pokemon world, thus joining his harem.
Arceus is quite popular. Given that it's considered the creator of the Pokemon universe in the official lore, it often has a significant role in fanfictions. Mewtwo is also very common. Its powerful psychic abilities and complex backstory make it a favorite for fanfic writers to explore. Another popular one is Lugia. With its majestic appearance and its connection to the sea, it's often a central figure in many stories.
A great Pokemon legendary fanfiction is one that reimagines the battles between legendaries. For instance, a story where Giratina and Palkia have a rematch in a different dimension, and the outcome has far - reaching consequences for the entire Pokemon universe. Some fanfictions also explore the idea of legendary Pokemon living in the human world incognito. Like a story where Lugia disguises itself as a normal seagull to observe humans and ends up befriending a small group of children who have an uncanny ability to sense its true nature. There are also those that focus on the mythology behind the legendaries. For example, a story that tells the ancient tales of the creation of the world by Arceus and how the other legendaries came to be in relation to that creation.
Arceus is said to be the creator of the Pokémon universe. It emerged from an egg in a void and then created the world and other Pokémon. Mew is considered the ancestor of all Pokémon. It has the DNA of every Pokémon species within it. Its origin is somewhat mysterious, just existing as this primordial being.
Mewtwo is also very popular. Given its origin as a genetically - engineered Pokemon, a human could interact with it in many ways. Maybe a human scientist wants to study Mewtwo further, or a young trainer tries to befriend Mewtwo and help it come to terms with its existence and powers.
They give depth to the Pokémon. For example, knowing the origin of Charizard as a final evolution of Charmander helps fans understand its fiery nature and its place in the Pokémon world better.
No. Most Pokémon origin stories are more positive or neutral. For example, Pikachu's origin is mainly about being an electric - type Pokémon that lives in certain habitats. However, the really twisted ones are more of the exceptions that add an interesting and darker side to the Pokémon world.